Screw



FIG. 1 is a perspective view of the screw.

FIG. 2 is a front view of the screw.

FIG. 3 is a rear view of the screw.

FIG. 4 is a left side view of the screw.

FIG. 5 is a right side view of the screw.

FIG. 6 is a top view of the screw; and,

FIG. 7 is a bottom view of the screw.

The broken lines in the drawings illustrate portions of the screw and form no part of the claimed design. 

CLAIM The ornamental design for a screw, as shown and described. 